[B][PATCH 1/2][SRU] selftests: rtnetlink: correct the final return value for the test

[Po-Hsu Lin]

BugLink: https://bugs.launchpad.net/bugs/1890136

The return value "ret" will be reset to 0 from the beginning of each
sub-test in rtnetlink.sh, therefore this test will always pass if the
last sub-test has passed:
    $ sudo ./rtnetlink.sh
    PASS: policy routing
    PASS: route get
    PASS: preferred_lft addresses have expired
    PASS: promote_secondaries complete
    PASS: tc htb hierarchy
    PASS: gre tunnel endpoint
    PASS: gretap
    PASS: ip6gretap
    PASS: erspan
    PASS: ip6erspan
    PASS: bridge setup
    PASS: ipv6 addrlabel
    PASS: set ifalias a39ee707-e36b-41d3-802f-63179ed4d580 for test-dummy0
    PASS: vrf
    PASS: vxlan
    FAIL: can't add fou port 7777, skipping test
    PASS: macsec
    PASS: ipsec
    3,7c3,7
    < sa[0]    spi=0x00000009 proto=0x32 salt=0x64636261 crypt=1
    < sa[0]    key=0x31323334 35363738 39303132 33343536
    < sa[1] rx ipaddr=0x00000000 00000000 00000000 c0a87b03
    < sa[1]    spi=0x00000009 proto=0x32 salt=0x64636261 crypt=1
    < sa[1]    key=0x31323334 35363738 39303132 33343536
    ---
    > sa[0]    spi=0x00000009 proto=0x32 salt=0x61626364 crypt=1
    > sa[0]    key=0x34333231 38373635 32313039 36353433
    > sa[1] rx ipaddr=0x00000000 00000000 00000000 037ba8c0
    > sa[1]    spi=0x00000009 proto=0x32 salt=0x61626364 crypt=1
    > sa[1]    key=0x34333231 38373635 32313039 36353433
    FAIL: ipsec_offload incorrect driver data
    FAIL: ipsec_offload
    PASS: bridge fdb get
    PASS: neigh get
    $ echo $?
    0

Make "ret" become a local variable for all sub-tests.
Also, check the sub-test results in kci_test_rtnl() and return the
final result for this test.

Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(backported from commit c2a4d2747996ee6a1397e2064d44a4f57ac442e6)
[PHLin: ignore multiple non-existing test cases]
Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
---
 tools/testing/selftests/net/rtnetlink.sh | 40 +++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index 5affdd1..7cc3b3e 100755
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -5,7 +5,6 @@
 # set -e
 
 devdummy="test-dummy0"
-ret=0
 
 # set global exit status, but never reset nonzero one.
 check_err()
@@ -63,7 +62,7 @@ kci_test_bridge()
 	devbr="test-br0"
 	vlandev="testbr-vlan1"
 
-	ret=0
+	local ret=0
 	ip link add name "$devbr" type bridge
 	check_err $?
 
@@ -110,7 +109,7 @@ kci_test_gre()
 	rem=10.42.42.1
 	loc=10.0.0.1
 
-	ret=0
+	local ret=0
 	ip tunnel add $gredev mode gre remote $rem local $loc ttl 1
 	check_err $?
 	ip link set $gredev up
@@ -146,7 +145,7 @@ kci_test_gre()
 kci_test_tc()
 {
 	dev=lo
-	ret=0
+	local ret=0
 
 	tc qdisc add dev "$dev" root handle 1: htb
 	check_err $?
@@ -181,7 +180,7 @@ kci_test_tc()
 
 kci_test_polrouting()
 {
-	ret=0
+	local ret=0
 	ip rule add fwmark 1 lookup 100
 	check_err $?
 	ip route add local 0.0.0.0/0 dev lo table 100
@@ -202,7 +201,7 @@ kci_test_polrouting()
 
 kci_test_route_get()
 {
-	ret=0
+	local ret=0
 
 	ip route get 127.0.0.1 > /dev/null
 	check_err $?
@@ -253,7 +252,7 @@ kci_test_addrlft()
 
 kci_test_addrlabel()
 {
-	ret=0
+	local ret=0
 
 	ip addrlabel add prefix dead::/64 dev lo label 1
 	check_err $?
@@ -293,7 +292,7 @@ kci_test_addrlabel()
 
 kci_test_ifalias()
 {
-	ret=0
+	local ret=0
 	namewant=$(uuidgen)
 	syspathname="/sys/class/net/$devdummy/ifalias"
 
@@ -348,7 +347,7 @@ kci_test_ifalias()
 kci_test_vrf()
 {
 	vrfname="test-vrf"
-	ret=0
+	local ret=0
 
 	ip link show type vrf 2>/dev/null
 	if [ $? -ne 0 ]; then
@@ -388,7 +387,7 @@ kci_test_vrf()
 
 kci_test_encap_vxlan()
 {
-	ret=0
+	local ret=0
 	vxlan="test-vxlan0"
 	vlan="test-vlan0"
 	testns="$1"
@@ -422,7 +421,7 @@ kci_test_encap_vxlan()
 
 kci_test_encap_fou()
 {
-	ret=0
+	local ret=0
 	name="test-fou"
 	testns="$1"
 
@@ -459,7 +458,7 @@ kci_test_encap_fou()
 kci_test_encap()
 {
 	testns="testns"
-	ret=0
+	local ret=0
 
 	ip netns add "$testns"
 	if [ $? -ne 0 ]; then
@@ -484,7 +483,7 @@ kci_test_encap()
 kci_test_macsec()
 {
 	msname="test_macsec0"
-	ret=0
+	local ret=0
 
 	ip macsec help 2>&1 | grep -q "^Usage: ip macsec"
 	if [ $? -ne 0 ]; then
@@ -524,6 +523,7 @@ kci_test_macsec()
 
 kci_test_rtnl()
 {
+	local ret=0
 	kci_add_dummy
 	if [ $ret -ne 0 ];then
 		echo "FAIL: cannot add dummy interface"
@@ -531,18 +531,30 @@ kci_test_rtnl()
 	fi
 
 	kci_test_polrouting
+	check_err $?
 	kci_test_route_get
+	check_err $?
 	kci_test_addrlft
+	check_err $?
 	kci_test_tc
+	check_err $?
 	kci_test_gre
+	check_err $?
 	kci_test_bridge
+	check_err $?
 	kci_test_addrlabel
+	check_err $?
 	kci_test_ifalias
+	check_err $?
 	kci_test_vrf
+	check_err $?
 	kci_test_encap
+	check_err $?
 	kci_test_macsec
+	check_err $?
 
 	kci_del_dummy
+	return $ret
 }
 
 #check for needed privileges
@@ -561,4 +573,4 @@ done
 
 kci_test_rtnl
 
-exit $ret
+exit $?
-- 
2.7.4